Implemented dynamically changing action bar menu items.
Added DiningSession packing and unpacking.
Removed mock dining session
Merge pull request #66 from glee23/master

Dynamically shows/hides check in, view bill buttons
Updated with a new Broadcast receiver to handle non static callbacks
Moved some stuff around DineOnUserActivity
Merge branch 'master' of https://github.com/blasv/DineOn

Conflicts:
	DineOnUserApplication/src/uw/cse/dineon/user/DineOnUserActivity.java
Ehh minor changes
Fixed conflicts
Tied together the ability to check in, Toast pops up showing a Dining
Session started.
Added null check for save in background to have a handler that does
nothing.
Create new user object